What To Do Once You've Downloaded A Module From The CPAN / 如果你直接從cpan下載了一個模組的話，接下來要怎麼安裝呢?

http://www.cpan.org/modules/INSTALL.html

基本上我上了黃色底色的部分是大家比較容易忽略的

1. If you're on Unix,(You can use Andreas König's CPAN module to automate the entire process, from DECOMPRESS through INSTALL.)
   A. DECOMPRESS
   
   
   

   Decompress the file with gzip -d yourmodule.tar.gz
   You can get gzip from ftp://prep.ai.mit.edu/pub/gnu.
   
   Or, you can combine this step with the next to save disk space:
   
   gzip -dc yourmodule.tar.gz | tar -xof -

   B. UNPACK
   
   

   Unpack the result with tar -xof yourmodule.tar

   C. BUILD
   
   

   Go into the newly-created directory and type:
   
   perl Makefile.PL
make
make test

   D. INSTALL
   
   

   While still in that directory, type:
   
   make install

   
   

   Make sure you have the appropriate permissions to install the module in your Perl 5 library directory. Often, you'll need to be root.
   That's all you need to do on Unix systems with dynamic linking. Most Unix systems have dynamic linking -- if yours doesn't, or if for another reason you have a statically-linked perl, and the module requires compilation, you'll need to build a new Perl binary that includes the module. Again, you'll probably need to be root.